Washington's Birthday, Carnaval, Día de la Bandera--all in one week. Let's take them one at a time.
The story of George Washington bravely motivating his rag-tag army which we learned as children as always been one of my favorite history stories. In more recent years, I have appreciated the importance of his dependence on Divine aid.

George Washington (born February 22 [February 11, Old Style], 1732, Westmoreland county, Virginia, -died December 14, 1799, Mount Vernon, Virginia.
Over time, as with many federal holidays, few Americans actually celebrate Washington's Birthday, and it is mainly known as a day off from work or school, although most non-governmental workers do not get the day off.When the Second Continental Congress assembled in Philadelphia in May 1775, Washington, one of the Virginia delegates, was elected Commander in Chief of the Continental Army. On July 3, 1775, at Cambridge, Massachusetts, he took command of his ill-trained troops and embarked upon a war that was to last six grueling years.
He realized early that the best strategy was to harass the British. He reported to Congress, "we should on all Occasions avoid a general Action, or put anything to the Risque, unless compelled by a necessity, into which we ought never to be drawn." Ensuing battles saw him fall back slowly, then strike unexpectedly. Finally in 1781 with the aid of French allies--he forced the surrender of Cornwallis at Yorktown.
Since 1862, there has been a tradition in the United States Senate that George Washington's Farewell Address be read on his birthday. Citizens had asked that this be done in light of the approaching Civil War. The annual tradition continues with the reading of the address on or near Washington's Birthday.
In his Farewell Address, he urged his countrymen to forswear excessive party spirit and geographical distinctions. In foreign affairs, he warned against long-term alliances. He spoke of his gratitude for the support of his beloved country as a strong incitement to unceasing vows that Heaven may continue to you the choicest tokens of its beneficence; that your union and brotherly affection may be perpetual; that the free constitution, which is the work of your hands, may be sacredly maintained; that its administration in every department may be stamped with wisdom and virtue; than, in fine, the happiness of the people of these States, under the auspices of liberty, may be made complete, by so careful a preservation and so prudent a use of this blessing, as will acquire to them the glory of recommending it to the applause, the affection, and adoption of every nation, which is yet a stranger to it.
http://www.biography.com/search/article.do?id=9524786; en.wikipedia.org/wiki/Washington's_Birthday
www.whitehouse.gov/about/presidents/georgewashington